https://github.com/avinashcodes/callbag-switch-map

https://github.com/avinashcodes/callbag-switch-map

Last synced: 18 days ago
JSON representation

• Host: GitHub
• URL: https://github.com/avinashcodes/callbag-switch-map
• Owner: avinashcodes
• License: mit
• Created: 2018-02-25T06:19:53.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2021-01-25T23:15:49.000Z (almost 4 years ago)
• Last Synced: 2024-09-17T05:39:17.817Z (about 2 months ago)
• Language: JavaScript
• Size: 12.7 KB
• Stars: 3
• Watchers: 1
• Forks: 2
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# callbag-switch-map 👜

A callbag operator that creates and switches to the new source whenever original source emits

`npm install callbag-switch-map`

## Usage:

Pullable Source

```js

const pipe = require('callbag-pipe');

const switchMap = require('callbag-switch-map');

const fromIter = require('callbag-from-iterable');

const forEach = require('callbag-for-each');

console.log('Pullable source');

pipe(

  fromIter('hi'),

  switchMap(char => fromIter([10, 20, 30]), (char,num) => char + num),

  forEach(x => console.log(x))

);

// Pullable source

// h10

// i10

// i20

// i30

```

Listenable Source

```js

const pipe = require('callbag-pipe');

const switchMap = require('callbag-switch-map');

const interval = require('callbag-interval');

const forEach = require('callbag-for-each');

const fromPromise = require('callbag-from-promise');

const fakeAjax = value => new Promise((resolve, reject) => {

	let period = value % 2 ? 400 : 1200; // Resolve odd numbers quickly

	setTimeout(resolve, period, (value*value));

});

console.log('Listenable source');

pipe(

  interval(500),

  switchMap(i => fromPromise(fakeAjax(i))),

  forEach(x => console.log(x))

);

// Listenable source

// 1

// 9

// 25

// 49

// 81

// 121

// ....

```